Blue composition for color filter, color filter, and color image display device

A technology for color images and display devices, used in lighting devices, instruments, filters, etc., to solve problems such as limited arrangement distance, inconvenient installation, and inability to continuously adjust white balance.

Inactive Publication Date: 2007-04-11
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the red, green and blue LED chips are assembled separately, there are the following problems: 1) installation is inconvenient, and 2) the arrangement distance of the red, green and blue LED chips is limited, which requires a distance between each LED chip and the light guide plate. The distance should be long enough to mix the colors emitted by each LED chip, and 3) combine an integer multiple of each LED chip to adjust the white chromaticity, so the white balance cannot be adjusted continuously

Method used

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  • Blue composition for color filter, color filter, and color image display device
  • Blue composition for color filter, color filter, and color image display device
  • Blue composition for color filter, color filter, and color image display device

Examples

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preparation example Construction

[0209] A specific example of the production method of the color filter of the present invention will now be described as follows. The color filter of the present invention is usually produced by forming red, green, and blue pixel images on a transparent substrate provided with a black matrix.

[0210] The material of the transparent substrate is not particularly limited. Examples of such materials include: thermoplastic sheets such as polyesters such as polyethylene terephthalate, polyolefins such as polypropylene and polyethylene, polycarbonate, polymethylmethacrylate, and polysulfone; Thermosetting plastic sheets such as oxygen resin, unsaturated polyester resin, poly(meth)acrylate resin, etc.; various glass plates, etc. Among these materials, glass plates and heat-resistant plastics are preferred in view of heat resistance.

[0211] In order to improve physical properties including surface adhesion, etc., the transparent substrate may be previously treated with corona dis...

Embodiment

[0320] The present invention is explained in more detail below with reference to Preparation Examples, Examples and Comparative Examples, but it should be noted that the present invention is by no means limited to the following Examples without departing from the scope of the present invention. In the following examples, "parts" means "parts by weight".

[0321] (1) Preparation of backlight

preparation example 1

[0322] (1-1) Preparation Example 1: Preparation Method of Backlight 1

[0323] A light emitting device was prepared according to the following procedure.

[0324] A light-emitting diode emitting 460nm light is connected to the bottom of the cover of the frame by die bonding, and then the light-emitting diode and the electrodes of the frame are connected by wire bonding.

[0325] Use Ca 2.97 Ce 0.03 sc 2 Si 3 o 12 As a phosphor emitting light in the green band and Ca 0.996 Eu 0.004 S serves as a phosphor that emits light in the red wavelength band. They are kneaded together with epoxy resin to obtain a paste, which is applied to the LEDs inside the enclosure and cured.

[0326] Then, a wedge-shaped annular polyolefin resin sheet (trade name "ZEONOR", produced by Zeon Corporation) having a size of 289.6 mm x 216.8 mm and a thickness of 2.0 mm at the maximum in the short side direction was used as the light guide. and a minimum thickness of 0.6mm, place the light source co...

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Abstract

There are provided a blue color composition for color filter, a color filter, and a color image display device capable of realizing an image of high purity. A color image display device is formed by a combination of an optic shutter, a color filter having at least three color elements: red, green, and blue corresponding to the optic shutter, and a backlight for transmission lighting. The backlight includes an LED in its structure. When the wavelength of the visible light range 380 to 780 nm for each 5 nm is lambdannm, the spectral transmittance (%) at the wavelength lambdannm by the red color pixel of the color filter is T(lambdan), and the relative light emission intensity normalized by the entire light emission intensity at the wavelength lambdannm from the backlight is I(lambdan), these satisfy the condition (1) as follows: I(620 - 680) x T(620 - 680) >= 1.1(1).

Description

technical field [0001] The invention relates to a blue composition for a color filter, a color filter and a color image display device. More specifically, the present invention relates to a blue composition for a color filter corresponding to the emission wavelength of an improved LED backlight capable of realizing an image with high color purity; the present invention also relates to A color filter and a color image display device. Background technique [0002] In recent years, application of liquid crystal display elements not only to existing personal computer monitors but also to general color televisions is expected. The color gamut of a color liquid crystal display element is determined by the chromaticity of the light emitted by the red, green and blue pixels. When the chromaticity point of each color pixel in the CIE XYZ color system is used (x R ,y R ), (x G ,y G ), (x B ,y B ), the color gamut is represented by the area of ​​the triangle surrounded by these ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357F21V8/00G02B5/20G02B5/22G02F1/1335F21Y103/00
Inventor 川名真金田英明木岛直人
Owner MITSUBISHI CHEM CORP
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